Drill press attachment



Ma 29, 1945. J MElR ET AL 2,377,259 pRILL PRESS ATTACHMENT Filed NOV.30, 1943 2 Sheets-Sheet l (/psEpaK MEI/2 v flan 101.0 DEER/Ch J. K. MEIRETAL DRILL PRESS A-TTACHMENT May 29, 1945.

Filed Nov. 30, 1943 2 Sheets-Sheet 2 Inventor.) (bsUw/f/Vne 00,1471.DEER/CA Patented May 29, 1945 DRILL PRESS ATTACHMENT Joseph kgMeir andDonald G. Derrick,

New York, N. Y.

Application November 30, 1943, Serial No. 512,362

1 Claim.

The present invention relates generally to drill presses, and has forits primary object to provide, in a manner as hereinafter set forth, anattachment comprising novel means whereby any one of a plurality oftools, such as drills or reamers, may be expeditiously brought intoposition for use.

Other objects of the invention are to provide a drill press attachmentof the aforementioned character which will be comparatively simple inconstruction, strong, durable, highly efficient and reliable in use,compact and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages of theinvention will become apparent from a study of the followingspecification, taken in connection with the accompanying drawingswherein like characters of reference designate corresponding partsthroughout the several views, and wherein:

Figure 1 is a View in front elevation of a drill press attachmentconstructed in accordance with the present invention.

Figure 2 is a view in side elevation of the device.

Figure 3 is a view in front elevation of the stationary portion of thedevice, showing the turret post or spindle in cross section.

Figure 4 is a View in vertical section through the turret.

Figure 5 is a fragmentary view in section, showing one of the springpressed ball detents for assisting in properly positioning or adjustingthe turret.

Figure 6 is a detail view in perspective of the drive shaft or spindle.

Referring now to the drawings in detail, it will be seen that theembodiment of the invention which has been illustrated comprises ametallic housing I of suitable dimensions, said housing beingsubstantially square in front elevation. Rising from the housing I is athreaded neck 2 having screwed thereon an upstanding sleeve 3. Thesleeve 3 is adapted to be slipped upwardly on the usual spindle housing4 of a conventional drill press for coupling the housing I thereto, saidsleeve 3 being secured by a set screw 5,

As illustrated to advantage in Figure 3 of the drawings, the front 6 ofthe housing I has formed therein an annular guide I of substantially V-shaped cross section. Sockets 8 are provided in the guide I, the purposeof which will be presently .set forth. Vertically aligned bearings 9 andI I) are provided on the front 5 and in the neck 2 of the housing I. Aspindle II is jourhousing 4 of the drill press.

naled in the bearings 9 and II]. The spindle II is provided with atapered upper end portion I2 for connection to the usual spindle in thetubular A beveled gear I3 is fixed on the lower end portion of thespindle II.

Projecting horizontally from the front 6 of the housing I is a post I4.A metallic turret I5 is rotatably and slidably mounted on the post I4.As best seen in Figure 5 of the drawings,the turret I5 is also square infront elevation in the embodiment shown.

The walls I6 of the turret I5 have mounted therein bearings I'I. ShaftsI8 are J'ournaled in the bearings H. The shafts I8 terminate, at

' their outer ends, in tapered, projecting sockets I detents in thesockets 8. Coil springs 26 in the sockets 8 yieldingly engage thedetents 25 in the sockets 24 and the groove 23.

A nut 21 is threaded on the outer end portion of the post I4 forsecuring the turret I5 in adjusted position on the housing I. Anoperating handle 28 is provided for the nut 21. Mounted on the post I4in the turret I5 is a collar 29. A coil spring 30 on the post I4 has oneend engaged with the collar 29 and its other end engaged with the turretI5 for yieldingly urging said turret outwardly on said post.

It is thought that the operation of the device will be readily apparentfrom a consideration of the foregoing. Briefly, the sleeve 3 is slippedupwardly on the lower portion of the tubular spindle housing 4 of thedrill -press and secured by the screw or bolt 5. When this is done, thespindle I I is operatively connected to the spindle of the drill press.The tools 20 are mounted in the ,chucks or sockets I9 and the device isready for' operation. Of course, the spindle II drives the lowermostshaft I8 through the beveled gears I3 and 22. To bring another tool intoposition for use, the nut 21 is backed off on the post I4 for permittingthe coil spring 30 to move the turret I5 outwardly on said post. Thus,the lowermost gear 22 is freed from the gear I3 and the tension of thedetent springs 26 is diminished. The turret l5 may now be readilyrotated on the post H to bring the desired tool into position for use.Proper adjustment of the turret I5 is facilitated by the ball detentssnapping into the sockets 24. The nut 21 is then tightened for forcingthe turret l5 inwardly on the post l4, thereby engaging the gear 22which is now lowermost with the gear 13 for actuation by the spindle II.

It is believed that the many advantages of a drill press attachmentconstructed in accordance with the present invention will be readilyunderstood, and although a preferred embodiment of the device is asillustrated and described, it is to be understood that changes in thedetails of construction and in the combination and arrangement of partsmay be resorted to which will fall within the scope of the invention asclaimed.

What is claimed is: A drill press attachment comprising a casing havinga neck at its upper end, a front wall for the casing having an openingin its lower portion, a bearing extending inwardly from the front wallunder the neck, a vertical spindle in said housing journaled through thebearing and the neck, a gear fixed on saidspindle at its lower end, an

annular tongue on the outer face of the front wall of the housing, apost projecting horizontally from said housing and mounted in a socketformed in the bearing, a turret rotatably and slidably mounted on thepost and formed with annular groove for receiving the annular tongue ofthe housing, bearings carried by walls of the turret and extendingradially of the post, a nut threaded on the post for engaging the outerface of the turret and securing the turret against rotation to thehousing, a collar carried by said post within the turret, a coil springmounted on the post between the collar and the outer wall of the turretfor urging the turret out of engagement with the housing, shaftsjournaled through bearings of the turret, sockets at outer ends of saidshafts for the reception of tools, gears on inner ends of the shaftsselectively engageable with the gear of the spindle for actuationthereby, and means carried by the neck for operatively connecting thedevice to the spindle housing of a drill press for actuation thereby.

JOSEPH K. m. DQNALD G. DERRICK.

